Abstract
To avoid the decomposition of hydroxyapatite (HA) and thus further increase its bioactivity, a novel bioactive Ta/HA composite coating (∼23 μm) is firstly fabricated by cold spraying mechanical milling Ta/HA composite powders. The results indicate that HA without decomposition and phase transformation is well contained and evenly distributed in the composite powders and coating. The simulated body fluid (SBF) test shows that bone-like apatite layer is mineralized on the surface of composite coating after 1–3 days. It demonstrates that the as-prepared Ta/HA composite coating has high bioactivity.
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